"History tells us there’s no more unstable, critical configuration than the combination of domestic democracy and foreign empire. You can be one or the other. You can be a democratic country, as we have claimed in the past to be, based on our Constitution. Or you can be an empire. But you can’t be both. …The causative issue is militarism. Imperialism, by definition, requires military force. It requires huge standing armies. It requires a large military-industrial complex. It requires the willingness to use force regularly. Imperialism is a pure form of tyranny. It never rules through consent, any more than we do in Iraq today."
This was written in 2007. For an update, just replace Iraq with Afghanistan, Pakistan, Yemen, the Horn of Africa, etc. The rest of the piece does not need an update. This is universal.
“The causative issue is militarism.”